Bottle cap



FIG. 1 shows a front perspective view of my new design;

FIG. 2 shows a side elevation view thereof with all other side elevation views being a mirror image thereof;

FIG. 3 shows a top plan view thereof; and,

FIG. 4 shows a side elevation view of the bottle cap of FIG. 1 mounted on a bottle.

The broken line showing a bottle is for illustrative purposes only and forms no part of the claimed design.

The bottom and interior of the bottle cap form no part of the claimed design. 

The ornamental design for a bottle cap, as shown and described. 